Fabrik-deutz



(No Model.)

N. A. OTTO. PETROLEUM OR OIL MOTOR ENGINE.

Patented Sept. '30

. O TM/l/l/f al/ UNIT D STATES PATENT OFFICE.

NICOLAUS AUGUST OTTO, OF COLOGNE, ASSIGNOR TO THE GAS-"\lOTOREN- FABRIK-DEUTZ, OF KOLN-DEUTZ, GERMANY.

PETROLEUM OR Oil. MOTOR ENGINE.

SPECIFICATION forming part of Letters Patent No. {137,507, dated September 30, 1890.

Application filed May 7,1890. Serial No. 350,910. (No model.) Patented in Belgium April 19, 1890, No. 90,245 in Switzerland April 21 and June 21, 1890,1T0. 2,035; in Norway April 25 and July 14-.,1890,1l0.1,746, andin Italy May 12, 1890, 1111,426.

To all whom it may concern:

Be it known that I, NICOLAUS AUGUST OTTO, a citizen of Prussia, residing at Cologne, in the Empire of Germany, have invented new and useful Improvements in Petroleum or Oil Motor Engines, (for which I have obtained patent in Belgium, dated April19, 1890, No. 90,245; in Norway, dated April 25 and July 14,1890, No. 1,746; in Switzerland, dated April 21 and June 21, 1890, No. 2,035, and in Italy, dated May 12, 1890, Vol. LIII, 426,) of which the following is a specification.

My invention relates to petroleum or oil motor engines, wherein the petroleum is ad mitted into a combustion-chamber of the cylinder, being converted into spray by means of an air-jet, and this spray being then mixed with the requisite air for producing the combustible charge.

My present improvement has for its objec to efiect a more complete vaporization of the oil-spray than heretofore by not only effecting such vaporization in the hot-charging end of the cylinder, or in the combustion chamber or passage communicating therewith, as heretofore, but also to eifect such vaporization before entering the cylinder or the combustionchamber. For this purpose the space or chamber in which the mixture of oil-spray and air is formed is separated from the combustionchamber by a valve. The oil-spraying apparatus is so arranged that the oil-spray carried forward by the air is made to impinge against a surface, which, on first starting, is heated by an external flame, and is afterward kept hot by the combustion of the charges in the cylinder. The oil-spray is thus converted into vapor, which, together with the air mixed therewith, is made to pass through the saidvalve into the combustion chamber or passage aud cylinder. Any oil that is still in the form of spray on passing through the valve will be converted into vapor on passing through the hot combustion-chamber. Any superfluous oil or particles that are not readily vaporized will flow down the sides of the mixing-chamber into a collecting-pocket, whence it can be withdrawn by a cock.

Figure 1 of the accompanying drawings shows a longitudinal section through the end of the engine-cylinder with thecombustion and vaporizing chambers. Fig. 2 is a crosssection through the combustion and vaporizing chambers and oil-inlet valve. Fig. 3 is an end View showing the valve-gear and a section through the combustion-chamber at the inlet-valve.

c is the combustion-chamber with igniting apparatus 2, and communicatingthrough a valve a with the vaporizing-chamber b, in which is the oil-inlet nozzle (1 and air-inlet g, below which is a pocket 6, for collecting the non-vaporized oil, which is withdrawn from time to time through the tap f. The top of the vaporizing-chamber b is formed by the wall w of the combustion-chamber, the part of which outside the former is heated by a flame 70 on first starting the engine. The oil is supplied to the nozzle (Z from the pipe provided with a regulating-cockl througha valve 2', opened at the proper time by a cam on the cam-shaft.

The action is as follows: As soon as the valve or, is opened by its cam during the suction-stroke, air enters through the opening g and passes through the restricted part of the chamber surrounding the oil -nozzle, and through the valve a into the combustionchamber 0, and thence to the cylinder. If at the same time or slightly afterward the'oilvalved be opened, the oil issuing through small lateral openings in the nozzle at will be converted into spray by the rapid current of air passing through the restricted space surrounding the same, and in being then made to impinge against the heated wall w will be converted into vapor intimately mixed with air on its passage through valve a into the chamber c, and thence into the cylinder. After completion of the suction-stroke the charge Will be compressed and then fired by the igniting device either at z or elsewhere. As before stated, on first starting the engine, the wall 10 is heated by an external flame It; but after the engine is started the heat is maintained in the chamber a by the combustion of the charges, so as effectually to com plete the vaporization of the oil.

Having thus described the nature of my invention and the best means I know for carrying the same into practical effect, I claim 1. In a petroleum-motor engine, the combination, with a passage or chamber of restricted diameter projecting from the cylinder end and serving for the introduction and ignition of the combustible charge, of a chamber 12, serving for the spraying and vaporizing of the oil and its admixture With air, such chamberb being separated from the said igniting passage or chamber by a valve a, but.

having a Wall in common therewith which is heated by an external flame on starting the engine,but is maintained hot by the combustion of the charges in the engine, an oil-spraying nozzle within such mixing-chamber situated opposite the heated Wall at a restricted part of the chamber, and an inlet for air below such spraying-nozzle, so that the entering air in passing through the restricted annular space surrounding the nozzle will effect the spraying of the oil and will project it against the heated wall so' as to convert the oil into vapor before entering the combustion-chamber, substantially as described.

In testimony whereof Ihave signed myname to this specification, in the presence of two subscribing Witnesses, this 21st day of April, A. D. 1890. r

NIOOLAUS AUGUST OTTO.

WVitnesses- PET. LANGEN, AUG. SPIEOKER. 

